题目内容
设i为虚数单位,则=
―2―3i
-2+3i
2-3i
2+3i
A.-2-3i
B.-2+3i
C.2-3i
D.2+3i
设i为虚数单位,则=( )
A.-2-3i B.-2+3i C.2-3i D.2+3i
复数设i为虚数单位,则=( )